Cut brussel sprouts in half, with the cut towards the stem. Place into a 9 x 14” pyrex baking pan or equivalent. Toss with sesame oil. Place into the oven for 15 minutes.
While baking, combine soy sauce, brown sugar and sesame seeds. Remove brussel sprouts from oven and toss with soy sauce mixture. Return to the oven for 15 minutes. Serve warm or cold.